I'm looking att buying a 8400 it's cheap and new.

What should i get 6600 or 8400?

Allso kyllpasta (no idea in english it's some sticky "glue" you put on CPU to make it cooler. How important is that? i forgot that for my e4400 might be reason why my Overheating happend's

And if anyone got xfire you can add me there as empa. i'm allmost online all the time lol.